Conformational analysis XX—13C NMR studies of saturated heterocycles 5—substituent effects on the13C chemical shifts of methyl substituted 1,3-dithiolanes

Organic Magnetic Resonance ◽

10.1002/mrc.1270170405 ◽

1981 ◽

Vol 17 (4) ◽

pp. 246-249 ◽

Author(s):

Kalevi Pihlaja ◽

Mauri Eskonmaa ◽

Raimo Keskinen ◽

Alpo Nikkilä ◽

Timo Nurmi

Keyword(s):

Conformational Analysis ◽

13C Nmr ◽

Chemical Shifts ◽

Substituent Effects ◽

Nmr Studies ◽

Saturated Heterocycles

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NMR Studies on Cyclic Arsenites. 13C NMR Spectra of Twenty-one 1,3,2-Dioxarsenanes. Substituent Effects of Alkyl and Phenyl Groups on the Chemical Shifts of the Ring Carbons.

Acta Chemica Scandinavica ◽

10.3891/acta.chem.scand.33a-0753 ◽

1979 ◽

Vol 33a ◽

pp. 753-758 ◽

Author(s):

Dagfinn W. Aksnes ◽

Oddmund Strømme ◽

Ralf Steudel

Keyword(s):

13C Nmr ◽

Nmr Spectra ◽

Chemical Shifts ◽

Substituent Effects ◽

13C Nmr Spectra ◽

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ChemInform Abstract: 13C CHEMICAL SHIFTS - SENSITIVE DETECTORS IN STRUCTURE DETERMINATION. 1. 13C NMR STUDIES OF SATURATED HETEROCYCLES. 4. METHYL-SUBSTITUTED 1,3-DIOXANES

Chemischer Informationsdienst ◽

10.1002/chin.198040071 ◽

1980 ◽

Vol 11 (40) ◽

Author(s):

K. PIHLAJA ◽

T. NURMI

Keyword(s):

13C Nmr ◽

Structure Determination ◽

Chemical Shifts ◽

Nmr Studies ◽

13C Chemical Shifts ◽

Saturated Heterocycles

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ChemInform Abstract: THE CONFORMATIONAL ANALYSIS OF SATURATED HETEROCYCLES PART 56, SUBSTITUENT EFFECTS IN THE CONFORMATIONAL EQUILIBRIA OF SPIRO-OXAZOLINES

Chemischer Informationsdienst ◽

10.1002/chin.197420096 ◽

1974 ◽

Vol 5 (20) ◽

pp. no-no

Author(s):

RICHARD A. Y. JONES ◽

ALAN R. KATRITZKY ◽

KEITH A. F. RECORD ◽

ROGER SCATTERGOOD ◽

JOHN M. SULLIVAN

Keyword(s):

Conformational Analysis ◽

Substituent Effects ◽

Conformational Equilibria ◽

Saturated Heterocycles

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13C NMR studies on fluorescent probes: 13C chemical shifts and longitudinal relaxation times of n-hydroxy-fatty (n=2,6,9,12) acids and n-(9-anthroyloxy)-stearic (n=6,12) acids

Chemistry and Physics of Lipids ◽

10.1016/0009-3084(79)90091-4 ◽

1979 ◽

Vol 24 (1) ◽

pp. 11-16 ◽

Author(s):

Stanley R. Johns ◽

Richard I. Willing ◽

Keith R. Thulborn ◽

William H. Sawyer

Keyword(s):

13C Nmr ◽

Fluorescent Probes ◽

Chemical Shifts ◽

Relaxation Times ◽

Nmr Studies ◽

13C Chemical Shifts ◽

Longitudinal Relaxation

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Influence of Aprotic Solvents on the Transmission of Anomalous Substituent Effects on 13C NMR Chemical Shifts at the Carboxyl Carbon (δco) in Meta-Substituted Benzoic Acids: A Strong Evidence for π-Polarization Mechanism

Applied Magnetic Resonance ◽

10.1007/s00723-011-0276-7 ◽

2011 ◽

Vol 42 (3) ◽

pp. 321-332 ◽

Author(s):

Susanta K. Sen Gupta ◽

Ruchi Shrivastava

Keyword(s):

13C Nmr ◽

Strong Evidence ◽

Chemical Shifts ◽

Substituent Effects ◽

Aprotic Solvents ◽

Benzoic Acids ◽

13C Nmr Chemical Shifts ◽

Polarization Mechanism ◽

Substituted Benzoic Acids ◽

Carboxyl Carbon

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19Si and 13C NMR studies of organosilicon chemistry. VI. Chemical shifts, coupling constants, and relaxation times for Me3SiSMe and (Me3Si)3N

Journal of Magnetic Resonance (1969) ◽

10.1016/0022-2364(76)90223-7 ◽

1976 ◽

Vol 23 (2) ◽

pp. 371-374 ◽

Author(s):

R.K Harris ◽

B Lemarié

Keyword(s):

13C Nmr ◽

Chemical Shifts ◽

Relaxation Times ◽

Coupling Constants ◽

Nmr Studies ◽

Organosilicon Chemistry

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13C NMR Chemical Shifts of Heterocycles: 3∗. Empirical Substituent Effects in 2-Halomethyl-2-hydroxy-tetrahydrofurans and -5,6-tetrahydro-4H-pyrans

Spectroscopy Letters ◽

10.1080/00387019608007056 ◽

1996 ◽

Vol 29 (4) ◽

pp. 631-640 ◽

Author(s):

Marcos A.P. Martins

Keyword(s):

13C Nmr ◽

Chemical Shifts ◽

Substituent Effects ◽

Nmr Chemical Shifts ◽

13C Nmr Chemical Shifts

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13C-NMR-Spektroskopie an polycyclischen Aromaten, IIΙ Die 13C-NMR-Spektren von Amino- und Dimethylaminonaphthalinen /13C NMR Spectroscopy of Polycyclic Aromatics, III The 13C NMR Spectra of Amino- and Dimethylaminonaphthalenes

Zeitschrift für Naturforschung B ◽

10.1515/znb-1975-9-1027 ◽

1975 ◽

Vol 30 (9-10) ◽

pp. 794-799 ◽

Author(s):

Ludger Ernst

Keyword(s):

13C Nmr ◽

Nmr Spectra ◽

Chemical Shifts ◽

Double Resonance ◽

Substituent Effects ◽

13C Nmr Spectroscopy ◽

Polycyclic Aromatics ◽

Electrophilic Reagents ◽

The 13C NMR spectra of twelve amino-, dimethylamino-, diamino-, and bis(dimethylamino)naphthalenes are completely assigned by selective 13C{1H} double resonance and by interpretation of proton-coupled spectra. Strong substituent effects (Δδ) upon chemical shifts are observed and can largely be accounted for by mesomerism. The pronounced high-field shifts of C-6 in the 2-amino- and 2-dimethylaminonaphthalenes coincide with the enhanced reactivity of this position towards electrophilic reagents. In 1-dimethylaminonaphthalene and even more so in 1-dimethylamino-2-methylnaphthalene, conjugation is inhibited for steric reasons and Δδ’s are greatly diminished, thus giving an estimate for the contribution of resonance to substituent-induced shifts in the unhindered compounds. In two 1,8-disubstituted naphthalenes there are large deviations from additivity of substituent effects.

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ChemInform Abstract: Substituent Effects in 1H and 13C NMR Correlations of Chemical Shifts in para-Substituted 5-Arylmethylenehydantoins

10.1002/chin.198748039 ◽

1987 ◽

Vol 18 (48) ◽

Author(s):

S.-F. TAN ◽

K.-P. ANG ◽

H. JAYACHANDRAN ◽

Y.-F. FONG

Keyword(s):

13C Nmr ◽

Chemical Shifts ◽

Substituent Effects ◽

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Carbon-13 NMR Studies of Nitrogen Compounds. II.-13C NMR Chemical Shifts of N-Substituted Formamides in Neutral and Acidic Solvents

Spectroscopy Letters ◽

10.1080/00387018108062602 ◽

1981 ◽

Vol 14 (6) ◽

pp. 423-430 ◽

Author(s):

J. Llinares ◽

R. Faure ◽

E. J. Vincent ◽

J. Elguero

Keyword(s):

13C Nmr ◽

Chemical Shifts ◽

Nitrogen Compounds ◽

Nmr Studies ◽

Nmr Chemical Shifts ◽

13C Nmr Chemical Shifts ◽

Acidic Solvents

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